[vsnet-alert 9771] OT_J111217.4-353829 (new optical transient)

[Taichi Kato]

  Based on Suzuki-san's astrometry, we use OT_J111217.4-353829
as its provisional name.

  YYYYMMDD(UT)   mag  observer
  20071218.292  11.49C  (Pi of the Sky)
  20071219.226  11.70C  (Pi of the Sky)
  20071219.231  11.69C  (Pi of the Sky)
  20071219.234  11.56C  (Pi of the Sky)
  20071219.237  11.61C  (Pi of the Sky)
  20071219.293  11.57C  (Pi of the Sky)
  20071223.469  129V  (Masayuki Suzuki)
  20071223.839  13.12C  (Kazuhiro Nakajima)

  The object thus has a range of 11.49-20.88, giving an outburst
amplitude of 9.4 mag !

  The current fading rate is not incompatible with the early
decline of a large-amplitude WZ Sge-type dwarf nova.
(If it is indeed a WZ Sge-type object, we can expect to see
early superhumps at this stage of the outburst).

  The amplitude and early decline reminds me of V592 Her
http://adsabs.harvard.edu/abs/2002PASJ...54..999K
(HV Vir and others, see the reference above).
Time-resolved photometry is strongly encouraged!